Problem with routing certain IP addresses betwqeen Cisco and Aruba

[neonetman]

Good morning,

 

I'm busy setting up a new Aruba switch to joing our existing Cisco network. I have set up the 3 Vlans, IP addresses and IP routing on the Aruba switch (see below)

 

I've added routes on the Cisco core switch to point to these vlans:-

 

 

I can ping 10.138.0.94, 10.138.2.93 and 10.138.93.1 addresses directly on the Aruba, yet from the core cisco, I can only ping 10.138.0.94

 

I'm assuming this is an issue with ip routing on the Aruba, however I'm struggling to get my head around exactly what I've missed.

 

Can anyone point me in the right direction of where to look?

[Jcx500]

Is it just a l2/ access switch ? (The Aruba one )

[FN-GM]

Have you put the static routes on both layer 3 switches?

 

Just out of curiosity why do you have more than 1 layer 3 switch?

[Jcx500]

we just set a default gateway on our aruba access switches, only ip and subnet are defined on the core

[FN-GM]

So you only have 1 layer 3 switch doing the routing? Is that the Cisco?

[neonetman]

For some reason all our switches in school are Layer 3 with routing enabled (was set up long prior to me being here)

 

The static routes on both the core switch (Cisco) and the new switch are in my post, and I think they are right

 

Would disabling IP routing on the HP and using default gateway allow the routing between the different VLans?

[Jcx500]

For some reason all our switches in school are Layer 3 with routing enabled (was set up long prior to me being here)

 

The static routes on both the core switch (Cisco) and the new switch are in my post, and I think they are right

 

Would disabling IP routing on the HP and using default gateway allow the routing between the different VLans?

 

 

Thats how we do it but it but our core is Aruba

[neonetman]

Okay... I've disabled IP routing, and added a default gateway. I can now ping all the switch IP addresses, however any devices connected to the switch are still not able to see anything beyond the switch

 

I'm busy updating firmware to the latest version to see if that makes any difference

[Jcx500]

Make sure the uplink is untagged on the switch vlan and all other vlans are tagged on the uplink

[FN-GM]

Make sure the uplink is untagged on the switch vlan and all other vlans are tagged on the uplink

 

This

 

On your Cisco switch they will call this a trunk. The port will need this:

 

Switch mode trunk

[neonetman]

Thanks for the help so far.... I think I have it almost there (re-enabled IP routing, and added 0.0.0.0/0 static route).

 

If I have a static IP on devices on the Aruba switch, they will connect fine, however they still can't pick up a DHCP address from our central DHCP server. I've set up a new scope on the right subnet, configuring as per the other subnets, but it's just not getting through

[neonetman]

Thank you all again - I've just added the helper addresses, and everything is working as expected.